drop off
phrasal verbdrop off (informal)
- to fall into a light sleep
打盹儿;小睡 - I dropped off and missed the end of the film.
我打了个盹儿,错过了影片的结尾。
- I dropped off and missed the end of the film.
- to become fewer or less
减少;下降 - Traffic in the town has dropped off since the bypass opened.
自从这条旁道通车后,城里来往的车辆就减少了。
- Traffic in the town has dropped off since the bypass opened.